Portable drinking straw case



FIG. 1 is a front, top perspective view of a portable drinking straw case, showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a cross-sectional view thereof, taken along line 8-8 in FIG. 5; and,

FIG. 9 is an exploded front, top perspective view thereof. 

CLAIM The ornamental design for a portable drinking straw case, as shown and described. 